Located in the Mansfeld-Südharz region, Saxony-Anhalt, in close proximity to the Klostermansfeld substation, the project is the largest of its kind in Germany. It has the capacity to supply around three million German households with electricity for at least four hours.
BW ESS first invested in the project in 2024 and took full ownership earlier this year. The initial developer and seller, Zelos Energy Developments, will continue to provide targeted support on local site matters until the project is further into construction, at the end of 2026.
As an experienced long-term owner-operator, BW ESS maintains direct oversight of its assets throughout their operational lifetime, taking a hands-on approach to unlock value throughout the energy storage asset lifecycle.
The project will become a major contributor to energy security and grid stability in Germany.
Klostermansfeld substation functions as one of few central nodes on the German energy grid and has recently been expanded to draw more electricity from the distribution grid and transport it via high voltage power lines. As such, Klostermansfeld BESS will strengthen the region structurally and bolster the grid’s ability to cope effectively with peak load periods.
“At BW ESS, we’re proud that our work in energy storage contributes directly to a resilient modern energy system” said Roberto Jiménez, Executive Director, BW ESS. “We’ve made a long-term commitment to help realise the potential of energy storage in Germany and Klostermansfeld BESS will be our first German asset to enter construction. We will continue to take an active approach to knowledge transfer across our portfolio, leveraging our extensive experience from the mature global markets.”
For additional information:
